iissaallpphhaa() -- ctype Function (libc)

Check if a character is a letter
#iinncclluuddee <ccttyyppee.hh>
iinntt iissaallpphhaa(_c) iinntt _c;

iissaallpphhaa()  tests whether  the argument  _c  is a  letter (AA-ZZ  or aa-zz).   It
returns a number other than zero  if _c is an alphabetic character, and zero
if it is not.  iissaallpphhaa() assumes that _c is an ASCII character or EOF.

_E_x_a_m_p_l_e
For an example of this macro, see the entry for ccttyyppee.hh.

_S_e_e _A_l_s_o
AASSCCIIII, lliibbcc
ANSI Standard, section 7.3.1.2
POSIX Standard, section 8.1
